Desuperheater



Aug. 1, 1944. P. SPENCE 253544,842

` DESUPERHEATER Original Filed Aug. 6, 1938 Jg l VllIlllIlIllII/M INVENTOR PAZ/L SEN SPE/VCE ATTORNEYS.

Patented Aug. 1, 1944 Y UNITED' .ASTA-TIES PATENT oFFlcE DESUPERHEATERy Paulsen Spence, East range,.N. J., assigner to Spence .Engineering Company, Inc., Walden,

N. Y., a corporation of Newv York Original application August 6, 1938, Serialy No. :223.444, Divided and this application February 23, 19,42, Serial No. 431,977

. AMy invention V relates to a. desuperheater, and this application is a division ofgmyapplication Serial No. 223,444, filed August (Lr-1938, now Pat-Y ent 2,293,314 datedv August ,1-8; 1942.

mally be connected through a'regulating lor-reducing valve to the main high pressure superheated steam line from the boiler. A suitable reducingor regulating valve is that shown yin As is Well known, in many power plants steam my Patent No. 1,995,949, dated March 26,1935. is generated underhighpressure and lsv-given a Such a regulating Valve will normally maintain high degreeof superheat.' In such sta-tions steam the desired pressure in the line 5, eventhoug-h usuallyat 'a lower pressure and having a lower the main pilot operating the main regulating temperature, even down to the temperature of Valve should be ruptured or damaged. Furthersaturated steam, is oftenrequired for the oper- 1 0 mOre, the Iegllll-Iillerv ValVe ShOWIl in my Said ation of auxiliaries, heating systemsyprocessing patent may be controlled by the temperature of andthe like. In many cases it is highly imsteam in the desuperheated line 5 so as to `shut portant that an uninterrupted supplyof desuperoff the regulating Valve Il CaSe the temperature heated steam be 'supplied and itis furthermore in thelne 5 `Should fOr any TeaSOIl ISaCh a Preimportant that neither the temperature nor the 1 5k determined abnormally high limt- VThe 6165111921- pressure of the desuperheated steamshail exceed 4heater System in its preferred combination form certain limits. A further requirement of a de- Will 110W be described. superheater inV many cases Vis. that' it shall be The line 5 iS PIOVded With afT-flttng 5 through adapted for the making of quick repairs or rewhich the desuperheater-unt l iS- dropped and placements. My'improved desuperheater is b'e- 20 held in the line 5 with the water nozzle aCgi-ng lievedto fully comply with all ofthe above requirements. ,f

It is an object of my invention, therefore, to provide an improvedform of desuperheater in which shut-downs for repairs or replacements will be reduced to va minimum. v

A further object is to provide a desuperheater which is simple in construction, not likely to get out of orden and serviceable in: use.

Another object is to provide an improved desuperheater unit which maybe very quickly removed. from the line for making Vrepairs or renewals and againquickly returned to the line.

Another object Vis to providean improvedform of desuperheater in which the water is ldivided into very ne particles so as tobe readily vaporized by the-superheated steam.:Y e Y I Other objects and'var'ious features of novelty and improvement will be hereinafter pointed out or will become apparent to those skilledinr the art. l

In the drawing which shows, for. illustrative purposes only, a preferredform of .the invention-- Fig. lis a central, sectional view through a,

part of the desuperheated ,steam .line and one form of my improved desuperheater; p

Fig. 2 is a fragmentary, sectional View tf1l en. substantiallyin the plane of the line 2-2 ofA into the oncoming steam. The improved` de-A superheater in its preferred form comprises a `head or flange B which may iit upon the ange 9 of the Tk-iitting 6 and be rigidly held between said flange S and a cap flange Ill secured to the flange 9 as by means of ange bolts I I-I I. `Suitable gaskets I2-I2 serve to make a steam-.tight joint between the head 8 and the flanges 9-I0. A water pipe I3 is rigidly secured in the head flange 8 preferably by means of a circumferential weld I4. A steam pipe I5 is similarly held to the head ange 8 as by a similar weld I4. The pipes IS-I 5 extend completely through the head flange 8 and into bores IB-Il in the cap flange I0. A water connection I8 and steam connection I9 are made to the flange cap I0 and pipesV I8- I9 extend into the bores IS-I'I so that there is free communication between the steam pipes and the water pipes, as will be clear. The water and steam pipes I8-I 9 are preferably rigidly secured to the cap flange II) by means of circumferential welds 20.

A desuperheater nozzle head 2| is secured to and carried by the lower ends of the pipes I 3-I 5. The head 2I lis preferably welded to the pipes as shown. In the form shown the head 2I hasfa longitudinal bore 22 for the reception of a water nozzle plug 23 which ts in the bore and may be secured therein as bya circumferentialweld 24. The plug 23 has an axial bore or passage 25 therein and the port 26 entering the bore 25 and forming a communication with the water .pipe I3 enters at an angle to the axis of the bore 25 and eccentrically thereto as lwill be` clear. In the forward end of the plug 23 is a removable water nozzle fitting 21 having a restricted .water outlet 28. The purpose of the angular and eccen.-

tric relationship of the port 26 and the bore 25 is to cause the water in passing from the pipe I3 to the exit Vent 28 to rotate or swirl in spiral form and issue from the water nozzle in the form of a spray cone so that the Water may be in a finely divided state and thus be readily taken up by the superheated steam iiowing against the spray cone. The nozzle head 2l is counterbored so as to provide an annular space 29 about L the water nozzle and a port 3l!Y permits passage of steam from the pipe I5 to such annular space.

A steam nozzle fitting 3l is removably secured in the end of the counterbore in the head 2l and is provided with an outlet passage 32 concentric zles, the steam Will serve to atomize that drip.`

When a greater volume of water flows, the cone effect heretofore noted will result and the steam while now not so necessary Will simply serve to more fully break up or atomize the water in the cone, all with the effect of providing a fine spray which is quickly vaporized by the superheated steam.

It will be seen that the T-tting 6 is of such size that the vhead 8, Water and steam pipes |3-I5, and entire nozzle head may' be'removed,

as a unit, the nozzle head and pipes passing freely through the opening in the T-fitting. If repairs or renewals are required, it will be seen that it will be a relatively simple matter to remove the entire desuperheater head and replace the same with a vspare unit with a minimum amount of down time yfor the line. The T-fitting may be of any suitable angle, such as a Y or a right angle T, as shown. Y

yWhile one form of the invention has been shown and described in detail, it is to be understood that various changes may be made within the scope'of the appended claims.

" I claim:

1 A nozzle head for a desuperheater including a head body having a bore therein, a water nozzle plug in said bore and having a longitudinally extending passage therein, a water nozzle detachably secured to said plug and having an exit passage therein, a water inlet connection tothe passage of said plug, said water inlet connection entering said plug at an angle to the axis thereof and eccentrically Vof the passage therein, and a steam nozzle detachably `secured to said head body and having an exit passage concentric with v the exit passage of said water nozzle, a steam inlet connection to said head body, and an annular space surroundingsaid Water nozzle and open to said steam inlet, whereby steam may flow concentrically of said Water nozzle and steam and sprayed water may lissue simultaneously from said nozzle.

l 2. In a desuperheater, a main steam pipe having a flanged fitting thereon, a head member on said flanged fitting, said head member having water and steam pipes rigidly secured therein, a nozzle head carried by and rigidly secured to said water and steam pipessaid nozzle head embodying steam and water nozzles, said nozzle head and water and steam pipes being of a size to freely pass through said flanged fitting on said Thus, n

, flanged cap to each other with said head interposed therebetween and held in steam-tight conkriectionwithlsaid flanged tting and anged cap.

3. In a desuperheater, a main steam line having a T-tting extending laterally therefrom, desuperheater means carried by said T-fitting, said desuperheater means including atomizing steam and water pipes extending through said T-tting and into said main steam line, a desuperheater nozzle means carried at the inner ends of said atomizing steam and Water pipes and having spray means for spraying water into said main steam lineand at substantially right angles to said atomizing steam and Water pipes.

4. In a desuperheater, a main steam line having a T-tting extending laterally therefrom, desuperheater means carried by said T-fitting, said desuperheater means including atomizing steam and Water pipes extending through said T-fitting and into said main steam line, a desuperheater nozzle means carried at the inner ends of said atomizing steam and water pipes and having spray means for spraying Water into said main steam line, said desuperheater means including said nozzle means being removable from said T-fitting as unit.

f 5. In a desuperheater, a steam line having a T-tting extending laterally therefrom, steam atomizing desuperheater means comprising atomizing steam and water conducting means having adjacent outlets, rsaid desuperheater means being unitarily assembled with a support, 'means for securing said support to said T-tting with said outlets positioned to discharge into said steam line, said T-fitting being of a size to freely pass the outlet portions 'of said desuperheater, for the purpose described.

6. In a desuperheater, a steam line having a T-ftting extending laterally therefrom, steam atomizing desuperheater means including steam and water nozzle means positioned adjacent each otherwand positioned in said steam line through said T-tting, water and steam pipes communicating with said nozzle means and supporting the latter, a support, said steam and water pipes being secured to said support, means for secur-l ing said support to said 'l1-fitting, said T-fltting being of Aa size to freely pass said desuperheater means and steam and water pipes connected thereto.

7. A nozzle head for a desuperheater including a head body having a bore therein, a Water nozzle plug fitting in said bore, a separate Water nozzle secured to said plug, said plug and Water nozzle having Water passage means communicating with a source of vwater supply, a separate steam nozzle secured to said head body and having a steam exit passage concentric with said Water nozzle, said head body having a steam passage communicating with said steam nozzle, said steam and water nozzles being positioned adjacent each other at their discharge ends and dening be-- tween them an annular space to causesteam yto escape annularly of said Water nozzle for atomizing water discharging from said Water nozzle.

PAULsEN sPENcp 

